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Mesoscale Discussion 109
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   Mesoscale Discussion 0109
   NWS Storm Prediction Center Norman OK
   0811 AM CST Sun Jan 22 2017

   Areas affected...Far southern Georgia and adjacent North Florida

   Concerning...Tornado Watch 19...

   Valid 221411Z - 221515Z

   The severe weather threat for Tornado Watch 19 continues.

   SUMMARY...Southern portions of WW 19 will likely need to be extended
   temporally after expiration time of 15Z.

   DISCUSSION...New strong to severe storm development continuing
   across the central and eastern Florida Panhandle will advance to the
   east-northeast through the southern extent of WW 19, and possibly
   affect a few additional northern tier of Florida counties during the
   mid-late morning.

   Mosaic radar imagery showed an active corridor of strong to severe
   storms (some tornadic) moving through the far southern extent of WW
   19 at this time.  The air mass south of these storms has continued
   to destabilize with MLCAPE increasing to 1000+ J/kg, and combined
   with strong effective bulk shear will continue to support the
   potential for supercell development. Objective analyses indicated
   effective SRH of 300-500 m2/s2 favoring the tornado threat this

   Portions of this region will likely be included in a PDS Tornado
   Watch later today as storms develop and spread into this region from
   the west.

   ..Peters/Thompson.. 01/22/2017


   LAT...LON   30808514 31458151 30948138 30408139 30208192 30108285
               30148357 30138401 30368463 30808514 

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